day 4 reference solution

script.js

@@ -1,4 +1,276 @@
+/**
+ * Lucky 11
+ */
+var rollDice = function () {
+  return Math.floor(Math.random() * 6) + 1;
+};
+
+// We do not use an input parameter because this game does not depend on input.
+var lucky11 = function () {
+  var diceRoll1 = rollDice();
+  var diceRoll2 = rollDice();
+  var standardMessage = `Dice 1: ${diceRoll1}. Dice 2: ${diceRoll2}.`;
+  if (diceRoll1 == 5 && diceRoll2 == 6) {
+    return `${standardMessage} You win!`;
+  }
+  return `${standardMessage} You lose.`;
+};
+
+/**
+ * Secret Word
+ */
+var numCorrectGuessesNeededToWin = 2;
+var numCorrectGuessesSoFar = 0;
+
+// Randomly return one of banana, chisel or faucet.
+var generateSecretWord = function () {
+  // Generate random number between 1 and 3
+  var numPossibleWords = 3;
+  var randomNum = Math.floor(Math.random() * numPossibleWords) + 1;
+
+  // Return the word that corresponds to the relevant number
+  if (randomNum == 1) {
+    return 'banana';
+  }
+  if (randomNum == 2) {
+    return 'chisel';
+  }
+  return 'faucet';
+};
+
+var playSecretWord = function (guessedWord) {
+  var secretWord = generateSecretWord();
+  var standardMessage = `You guessed: ${guessedWord}. Secret word: ${secretWord}.`;
+  if (secretWord == guessedWord) {
+    // "+=" (below) is just a shorter way to write  <numCorrectGuessesSoFar=numCorrectGuessesSoFar+1>
+    numCorrectGuessesSoFar += 1;
+    if (numCorrectGuessesSoFar >= numCorrectGuessesNeededToWin) {
+      // Reset counter of correct guesses to restart game.
+      numCorrectGuessesSoFar = 0;
+      return `${standardMessage} You guessed twice correctly. You win! Please play again.`;
+    }
+    return `${standardMessage} You guessed correctly! You need 1 more correct guess to win.`;
+  }
+  var numCorrectGuessesRemainingToWin =
+    numCorrectGuessesNeededToWin - numCorrectGuessesSoFar;
+  return `${standardMessage} You guessed incorrectly. You need ${numCorrectGuessesRemainingToWin} more correct guesses to win.`;
+};
+
+/**
+ * Secret Word Twice in a Row
+ */
+var prevSecretWord = '';
+
+// Randomly return banana, chisel or faucet without repeating words across consecutive guesses.
+var generateSecretWordNoRepeats = function () {
+  var secretWord = prevSecretWord;
+  // Keep generating secret words until we get a different word
+  // "While" Creates a loop that repeats itself as long as a given condition is true (the condition being assessed is that which is in the parenthesis). We'll learn more about "while loops" in Day 6. You can also read more about "while loops" here: https://www.w3schools.com/jsref/jsref_while.asp
+  while (secretWord == prevSecretWord) {
+    // Use generateSecretWord function from previous exercise
+    secretWord = generateSecretWord();
+  }
+  // Keep track of the current secret word as prevSecretWord in the next guess.
+  prevSecretWord = secretWord;
+  return secretWord;
+};
+
+var playSecretWordTwiceInARow = function (guessedWord) {
+  var secretWord = generateSecretWordNoRepeats();
+  var standardMessage = `You guessed: ${guessedWord}. Secret word: ${secretWord}.`;
+  if (secretWord == guessedWord) {
+    // Use numCorrectGuessesSoFar and numCorrectGuessesNeededToWin variables from prev exercise.
+    numCorrectGuessesSoFar += 1;
+    if (numCorrectGuessesSoFar >= numCorrectGuessesNeededToWin) {
+      // Reset counter of correct guesses to restart game.
+      numCorrectGuessesSoFar = 0;
+      return `${standardMessage} You guessed correctly twice in a row. You win! Please play again.`;
+    }
+    return `${standardMessage} You guessed correctly! You need 1 more correct guess to win.`;
+  }
+  // Reset counter of correct guesses to 0 to implement 2 in a row rule.
+  numCorrectGuessesSoFar = 0;
+  return `${standardMessage} You guessed incorrectly. You need 2 more correct guesses to win.`;
+};
+
+/**
+ * Secret Word X in a Row
+ */
+// Initialise isStartOfRound to true to generate numCorrectGuessesNeededToWin at start of round.
+var isStartOfRound = true;
+
+// Generate random number between 2 and 4
+var generateNumCorrectGuessThreshold = function () {
+  return Math.floor(Math.random() * 3) + 2;
+};
+
+var playSecretWordXInARow = function (guessedWord) {
+  // If start of round, re-generate num correct guesses needed to win.
+  if (isStartOfRound) {
+    numCorrectGuessesNeededToWin = generateNumCorrectGuessThreshold();
+    // Set isStartOfRound to false until start of next round.
+    isStartOfRound = false;
+  }
+
+  // Generate secret word without repeats
+  var secretWord = generateSecretWordNoRepeats();
+  var standardMessage = `You guessed: ${guessedWord}. Secret word: ${secretWord}.`;
+
+  // Guess is correct
+  if (secretWord == guessedWord) {
+    // Use numCorrectGuessesSoFar and numCorrectGuessesNeededToWin variables from prev exercise.
+    numCorrectGuessesSoFar += 1;
+    if (numCorrectGuessesSoFar >= numCorrectGuessesNeededToWin) {
+      // Reset counter of correct guesses to restart game.
+      numCorrectGuessesSoFar = 0;
+      // Reset isStartOfRound to true to generate new num correct guesses threshold the next round.
+      isStartOfRound = true;
+      return `${standardMessage} You guessed correctly ${numCorrectGuessesNeededToWin} times in a row. You win! Please play again.`;
+    }
+    var numCorrectGuessesRemainingToWin =
+      numCorrectGuessesNeededToWin - numCorrectGuessesSoFar;
+    return `${standardMessage} You guessed correctly! You need ${numCorrectGuessesRemainingToWin} more correct guess to win.`;
+  }
+
+  // Guess is incorrect
+  // Reset counter of correct guesses to 0 to implement X in a row rule.
+  numCorrectGuessesSoFar = 0;
+  return `${standardMessage} You guessed incorrectly. You need ${numCorrectGuessesNeededToWin} more correct guesses to win.`;
+};
+
+/**
+ * Dice Within
+ */
+// Store within number as global to persist across guesses.
+var withinNum;
+
+// Generate number from 1 to 3
+var generateWithinNum = function () {
+  return Math.floor(Math.random() * 3) + 1;
+};
+
+var diceWithin = function (playerGuess) {
+  // Use isStartOfRound variable from previous secret word exercise
+  if (isStartOfRound) {
+    withinNum = generateWithinNum();
+    isStartOfRound = false;
+  }
+  var diceRoll = rollDice();
+  var standardMessage = `Your guess: ${playerGuess}. Dice roll: ${diceRoll}. Within number: ${withinNum}.`;
+
+  if (
+    playerGuess <= diceRoll + withinNum &&
+    playerGuess >= diceRoll - withinNum
+  ) {
+    isStartOfRound = true;
+    return `${standardMessage} You win!`;
+  }
+  return `${standardMessage} You lose.`;
+};
+
+/**
+ * Dice Within with 2 Dice
+ */
+var determineIsWithinRange = function (guess, diceRoll) {
+  return guess >= diceRoll - withinNum && guess <= diceRoll + withinNum;
+};
+
+// Determine if the guess is within the range of either dice rolls 1 or 2
+var determineWin = function (guess, diceRoll1, diceRoll2) {
+  return (
+    determineIsWithinRange(guess, diceRoll1) ||
+    determineIsWithinRange(guess, diceRoll2)
+  );
+};
+
+var diceWithinWith2Dice = function (playerGuess) {
+  // Use isStartOfRound variable from previous Secret Word exercise
+  if (isStartOfRound) {
+    // Use withinNum variable from previous Dice Within exercise
+    withinNum = generateWithinNum();
+    isStartOfRound = false;
+  }
+  var diceRoll1 = rollDice();
+  var diceRoll2 = rollDice();
+  var standardMessage = `Your guess: ${playerGuess}. Dice roll 1: ${diceRoll1}. Dice roll 2: ${diceRoll2}. Within number: ${withinNum}.`;
+
+  if (determineWin(playerGuess, diceRoll1, diceRoll2)) {
+    isStartOfRound = true;
+    return `${standardMessage} You win!`;
+  }
+  return `${standardMessage} You lose.`;
+};
+
+/**
+ * Dice 4D
+ */
+var is4dTime = false;
+var numWins = 0;
+
+var play4d = function (playerGuess) {
+  var fourDNum = Math.floor(Math.random() * 10000);
+  var outputMessage = `Your guess: ${playerGuess}. 4D number: ${fourDNum}.`;
+  if (playerGuess == fourDNum) {
+    outputMessage += ' You won 4D! Congratulations!';
+  } else {
+    outputMessage += ' You did not win 4D.';
+  }
+  return `${outputMessage} Please enter a dice roll guess. To play 4D again, please play and win the dice game twice.`;
+};
+
+var dice4d = function (playerGuess) {
+  // Play 4D if it's 4D time
+  if (is4dTime) {
+    is4dTime = false;
+    return play4d(playerGuess);
+  }
+
+  // Generate new within number if it's the start of a dice round.
+  // Use isStartOfRound variable from previous Secret Word exercise
+  if (isStartOfRound) {
+    // Use withinNum variable from previous Dice Within exercise
+    withinNum = generateWithinNum();
+    isStartOfRound = false;
+  }
+
+  // Generate dice numbers
+  var diceRoll1 = rollDice();
+  var diceRoll2 = rollDice();
+  var standardMessage = `Your guess: ${playerGuess}. Dice roll 1: ${diceRoll1}. Dice roll 2: ${diceRoll2}. Within number: ${withinNum}.`;
+
+  // If the player wins, return the appropriate message.
+  if (determineWin(playerGuess, diceRoll1, diceRoll2)) {
+    isStartOfRound = true;
+    // Keep track of number of wins such that the user can play 4D every 2 wins.
+    numWins += 1;
+    if (numWins >= 2) {
+      // Reset number of wins every 2 wins.
+      numWins = 0;
+      // Set is4dTime to true so player can play 4D at next round.
+      is4dTime = true;
+      return `${standardMessage} You've won twice! Time to play 4D! Enter your 4D guess.`;
+    }
+    return `${standardMessage} You win! 1 more win to play 4D!`;
+  }
+
+  // Player loses. Output number of wins left to play 4D.
+  var numWinsRemainingToPlay4d = 2 - numWins;
+  return `${standardMessage} You lose. You need ${numWinsRemainingToPlay4d} more wins to play 4D.`;
+};
+
+/**
+ * Instructions:
+ * Each group of functions under a "/**" comment represents 1 exercise, and
+ * each function in the following main function represents 1 exercise.
+ * Uncomment 1 function at a time and comment out all others to
+ * execute the code for the relevant exercise.
+ */
 var main = function (input) {
-  var myOutputValue = 'hello world';
-  return myOutputValue;
+  return lucky11();
+  // return playSecretWord(input);
+  // return playSecretWordTwiceInARow(input);
+  // return playSecretWordXInARow(input);
+  // return diceWithin(input);
+  // return diceWithinWith2Dice(input);
+  // return dice4d(input);
 };